SPF123 Fossil stromatolite polished on one side with natural weathered exterior.
This is the other half of SPF122.
These are the oldest known fossils on Earth.
From the Strelley Pool Formation in the Pilbara region of Western Australia.
Age is approx. 3.4 billion years.
Dimensions at widest points approx. 140 mm x 125 mm x 40 mm thick.
Weighs 770 grams.